18
Maintenance
and repair
When the synchrocheck relay is operating un-
der the conditions specified in the section "Tech-
nical data", the relay is practically maintenance-
free. The relay modules include no parts or com-
ponents subject to an abnormal physical or
electical wear under normal operating condi-
tions.
If the environmental conditions at the relay
operating site differ from those specified, as to
temperature, humidity, or if the athmosphere
around the relay contains chemically active gases
or dust, the relay should to be visually inspected
in association with the relay secondary test or
whenever the relay modules are withdrawn from
the case. At the visual inspection the following
things should be noted:
- Signs of mechanical damage on the relay mod-
ules, contacts and relay case
- Accumulation of dust inside the relay cover
or case; remove by flowing air carefully
- Rust spots or signs of erugo on terminals, case
or inside the relay
On request, the relay can be given a special treat-
ment for the protection of the printed circuit
boards against stress on materials, caused by
abnormal environmental conditions.
If the relay fails in operation or if the operating
values remarkable differ from those of the relay
specifications, the relay should be given a proper
overhaul. Minor measures can be taken by per-
sonnel from the instrument work-shop of the
customer's company, e.g. replacement of auxil-
iary relay modules. All major measures involv-
ing overhaul of the electronics are to be taken
by the manufacturer. Please contact the manu-
facturer or his nearest representative for further
information about checking, overhaul and
recalibration of the relay.
Note!
Static relays are measuring instruments and
should be handled with care and protected
against moisture and mechanical stress, espe-
cially during transport.
Spare parts
Capacitor bank protection relay module SPCJ 4D40
Power and output relay module
U
aux
= 80 ... 265 V ac/dc SPTU 240 R2 for NO trip contact
U
aux
= 18 ... 80 V dc SPTU 48 R2 for NO trip contact
Relay box, complete with input module SPTK 4E3
Input module as separate part SPTE 4E3
Bus connection module SPA-ZC 17_ or SPA-ZC 21_
Ordering
numbers
Capacitor bank protection without testswitch
SPAJ 160 C RS 611 051 - AA, CA, DA, FA
Capacitor bank protection with testswitch type RTXP 18
SPAJ 160 C RS 611 251 - AA, CA, DA, FA
The last letters of the ordering number indicate the rated frequency f
n
and
the auxiliary voltage range U
aux
of the relay as follows:
AA equals f
n
= 50 Hz and
U
aux
= 80...265 V ac/dc
CA equals f
n
= 50 Hz and
U
aux
= 18...80 V ac/dc
DA equals f
n
= 60 Hz and
U
aux
= 80...265 V ac/dc
FA equals f
n
= 60 Hz and
U
aux
= 18...80 V ac/dc
Power supply and output relay modules:
SPTU 240 R2 RS 911 021 - AA
SPTU 48 R2 RS 911 021 - BA
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